I added 3 Blue/Green chromis about 3 months ago at the same time. Never really saw much aggression, seem to have got along fine. The other night I was looking over from my chair and noticed the smallest hanging out under the hob overflow and it looked like it some type of injury. I wasn't that alarmed at the time, but know I can't find it anywhere. I'll keep a watch on the other two but I have never seen signs of Uronema.



